To estimate a maximum purchase price for the coin in question, we can consider several factors based on the provided data:

1. Coin Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Auction Prices: By looking at the hammer prices of coins with a similar condition (80), we can see that they have reached varying hammer prices, with some being quite high. For example:
- In 2023, a coin with a condition of 80 was auctioned for 160 euros.
- In 2022, another coin with a condition of 80 was auctioned for 120 euros.

3. Average Hammer Price: The average hammer price for this coin is 105.41 euros, which gives us a good reference for what buyers are willing to pay.

4. Estimated Price: In previous auctions, the estimated price for coins with similar conditions has ranged between 70 and 150 euros.

5. Auction Trends: The coin has been auctioned 41 times, of which 34 have sold. This indicates a consistent interest in the coin, which may influence the price.

Taking all these factors into account, an estimated maximum purchase price for this coin could be in the range of 120 to 160 euros, considering that the condition is good and there is demonstrated interest in previous auctions.

Therefore, a reasonable maximum purchase price could be 150 euros.